The ZnO/Ag/ZnO multiple films with different thickness of Ag film were grown via magnetron sputtering method. The morphology
optical absorption spectra
photoluminescence and photoresponse properties were studied. The results exhibited that the intensity of photoluminescence was increased with the adding of the Ag film into ZnO film. The photo responsivity was 0.06 A/W at 350 nm when the thickness of the Ag film was 6 nm. Compared with ZnO film this value was improved one magnitude. However
the photo responsivity was decreased when the thickness of the Ag film was reached 15 nm.
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